Combination-padlock.



W. H. SANDERS.

COMBINATION PADLOCK. APPLlCATiON FILED APR.23,1915.

Patented Mar. 20, 1917.

2 SHEETSSHEET 1.

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W.H. SANDERS. CQMBINATION PADLOCK. APPLICATION FILED APR. 23, 1915.

Patented Mar. 20, 1917.

2 SHEETS-SHEET 2- WILLIAM H. SANDERS, 0F BEDFORD HILLS, NEW YORK.

COMBINATION -PADLOCK.

Application filed April 23, 1915.

To all whom it may concern:

Be it known that 1, WILLIAM H. SANDERS, a citizen of the United States,residing at Bedford Hills, in the county of Vestchester, State of NewYork, have invented certain new and useful Lnproveinents inCombinationPadlocks; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to new and useful improvements in looks, and isparticularly directed to the provision of a permutation lock providedwith means for changing the combination of the lock.

One important object of the invention is to improve and simplify thegeneral construction of devices of this character.

A second important object of the invention is to provide an improved andsimplified device of this character wherein the combination may bechanged by the user when desired.

TWith the above and other objects and advantages in view, the inventionresides more particularly in the novel combination, formation andarrangement of parts as more fully described and pointed out in theappended claim.

Reference is had to the accompanying drawings, wherein similarcharacters of ref erence designate the corresponding parts throughoutthe several views, and in which:

Figure 1 is a. front view of the lock.

Fig. 2 is a rear view thereof with the back plate removed.

Fig. 3 is a sectional view taken vertically through the lock on the line3-3 of Fig. 2, the back plate being shown in place in this view.

Fig. 4: is a sectional view taken horizontally on the line 4l4 of Fig. 2and showing the back plate in place.

Fig. 5 is a perspective view of the back plate.

Fig. 6 is a perspective view of the tumbler shaft and certain partsconnected thereto detached from the lock casing.

Fig. 7 is a perspective view of one of the tumblers, and

Fig. 8 is a perspective view of the back plate holding member.

Referring now more particularly to the accompanying drawings, the casingof the lock is shown as comprising the front wall Specification ofLetters Patent.

Patented Mar. 20, 1917.

Serial No. 23,479.

5, the sides 6, the top 7 and the bottom 8 which is relatively wide toaccommodate the holding means for the detachable back plate 9. This backplate has its top portion beveled, and is provided with a beveled tenon10, and the top 7 is extended, and has the under face of said extendedportion beveled and provided with a recess at 11 to receive the tenon ofthe back plate whereby the upper portion of the back plate may be heldagainst displacement. To hold the lower portion of the back plateagainst displacement laterally and relieve strain on the holding meansto be described, the bottom 8 of the lock is provided with a projection12 which seats in a recess 13 in the back plate.

The tumbler mechanism for the lock comprises a plurality of telescopingshaft sections 1-1. The outermost of which is journaled in an opening 15in the front wall of the lock. Inwardly of the wall the shafts aresuccessively extended one past the other to provide free peripheralportions and these portions are squared or otherwise provided withregular series of faces 16 to operatively engage each a respectivetumbler member. Outwardly of the wall the shafts are enlarged, the outerportions successively extended one past the other, and the free portionsthus provided carry a series of indicator plates 17. Each of the tumblermem iers comprises disk 18 having its peripheral portion cut away at 19at one side to release the shackle member as will be described andprovided with a central opening 20 to seat on one of the portions 16 ofits re spective shafts. The tumblers are held in place on the shafts bya disk or washer 21 secured to the end of the innermost shaft by a screwTo hold the outermost shaft against displacement from the casing, a

disk 23 is secured thereon by means of pins- Qat engaged in theshoulders formed by squaring the shaft inwardly of the front wall. Theindicator plates 17 carry series of symbols 25, and the portions 10 ofthe shafts, which in this instance are square carry correspondingsymbols 26, there being relatively more symbols on the plates 17 whichthus serve as dummies. The numbers on the plates 17 are so correlatedwith the numbers on the squared members 16 that when one of the tumblers18 is placed on a squared member 16 with the portion 19 opposite anumber on said squared member the as to increase the number ofcombinations that may be made. Thus with any given setting in theconstruction shown there will be one number on each plate which is anoperative number while the remainder will be dummies and there are fournumbers on each plate which may be made operative numbers by properlyshifting the position of the respective tumbler 1.8. The lock isprovided with a usual shackle 27 which has its arms extended through thetop 7 of the casing. That arm adjacent the tumbler mechanism beingrelatively shorter, and being provided with an arcuate cut away portion28 for receiving the peripheral portions of the tumblers, this arm beingspaced from the axis of the tumblers, a sufficient distance so that whenthe cutaway portions 19 thereof are alined and disposed opposite thesaid arm, the shackle may be drawn to move the arm outwardly of thecasing to thus unlock the lock. The other arm 29 of the shackle isextended into a cutaway portion 30 formed in one end of the bottom 8.and is adapted to be engaged in a strap member 31 carried by the backplate 9 and adapted to extend in said recess.

Thus the back plate is held against removal except when the shackle isin an unlocked position. To further hold this back plate so that it willnot become displaced except when desired to remove it, a recess 32 isprovided in the bottom 8 and the bottom Copies of this patent may beobtained for five cents each, by addressing the is further provided witha bore 33 communicating with the recess. Slidably positioned in therecess is a keeper block 34L having a slot 35 formed in its underportion to receive a strap member 36 carried by the back plate, theblock being normally urged to such holding position by a leaf spring 37'combination of the lock, the shackle is drawn to inoperative positionand the button Y 38 pressed so that the back plate may be removed. Readyaccess is thus had .to the tumbler mechanism, and this is changed byunscrewing the screw 22 and removing the tumblers to replace themdifferently on the shafts.

What is claimed is: A lock of the class described comprising a casing,the top of'the casing being extended and beveled and provided with arecess,

a detachable back portion having its top beveled, a. tenon thereonengaging in the recess, a shackle, permutation mechanism for saidshackle. a member carried by the back portion and engageable by theshackle, a second member carried by the back portion, and a keeper blockin the casing for engaging said second, member.

In testimony whereof, I aflix my i'gnature, in the presence of twowitnesses.

WILLIAM H. SANDERS. lVitnesses ALLEN VAN TASSEL, ALBERT V. VANnnRon'F.

Commissioner of Patents- Washington, D. 0.

